The term 'Black Watch' refers to a type of tartan PLAID, which is a pattern of criss-crossed horizontal and vertical bands in multiple colors. The term is derived from the name of a Scottish military regiment, the Black Watch, which was formed in 1725. The regiment's uniform featured a distinctive tartan PLAID, which has since become known as the Black Watch PLAID. The PLAID is typically composed of dark green, black, navy blue, and red stripes.